package com.yequan.designpattern.monitor.callback;

/**
 * @author yequan
 * @date 2019/12/10
 */
public class Caller {

    public void call(ICallBack iCallBack) {
        System.out.println("call start ...");
        iCallBack.callBack();
        System.out.println("call end ...");
    }

}
